LOW-VOLTAGE 24-BIT BUS EXCHANGE SWITCH

Transcription

1 LOW-VOLTAGE 4-BIT BUS EXCHANGE ITCH LOW-VOLTAGE 4-BIT BUS EXCHANGE ITCH IDT74CBTLV6 FEATURES: 5Ω A/B bi-directional switch Isolation Under Power-Off Conditions Over-voltage tolerant Latch-up performance exceeds 00mA VCC =.V -.6V, normal range ESD >00 per MIL-STD-88, Method 05; >0 using machine model (C = 00pF, R = 0) Available in TSSOP package DESCRIPTION: The CBTLV6 provides a set of 4 high-speed switches for bus exchanging and switching. The device has low ON resistance, resulting in under 50ps propagation delay through the switch. The CBTLV6 operates as a single 4-bit bus switch or as a -bit bus exchanger, which provides data exchanging between the four signal ports through the data select (S0-S) pins. The CBTLV6 has the break-before-make feature, which allows zero current when switching between ports B and B. APPLICATIONS:.V High Speed Bus Switching and Bus Isolation FUNCTIONAL BLOCK DIAGRAM SIMPLIFIED SCHEMATIC, EACH ITCH A 54 B A 5 B A B A 7 0 B A 8 9 B FLOW CONTROL CIRCUITRY S0 S 56 S 55 The IDT logo is a registered trademark of Integrated Device Technology, Inc. DECEMBER 04 c 04 Integrated Device Technology, Inc. DSC-5889/8

2 LOW-VOLTAGE 4-BIT BUS EXCHANGE ITCH PIN CONFIGURATION S0 A A A A A A 4A 4A 5A 5A 6A 6A 7A 7A VCC 8A 8A 9A 9A 0A 0A A A A A TSSOP TOP VIEW S S B B B B B B 4B 4B 5B 5B 6B 6B 7B 7B 8B 8B 9B 9B 0B 0B B B B B OPERATING CHARACTERISTICS () ABSOLUTE MAXIMUM RATINGS () Symbol Description Max. Unit VCC Supply Voltage Range 0.5 to 4.6 V VI Input Voltage Range 0.5 to 4.6 V Continuous Channel Current 8 ma IIK Input Clamp Current, VI/O < 0 50 ma TSTG Storage Temperature Range 65 to +50 C. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. PIN DESCRIPTION Pin Names S x xax xbx Data Select Port A Inputs or Outputs Port B Inputs or Outputs FUNCTION TABLE () Description Inputs Inputs/Outputs S S S0 A A Operation L L L Z Z Disconnect L L H B Z A port = B port L H L B Z A port = B port L H H Z B A port = B port H L L Z B A port = B port H L H Z Z Disconnect H H L B B A port = B port A port = B port H H H B B A port = B port A port = B port. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance Symbol Parameter Test Conditions Min. Max. Unit VCC Supply Voltage..6 V High-Level Control Input Voltage VCC =.V to.7v.7 V VCC =.7V to.6v VIL Low-Level Control Input Voltage VCC =.V to.7v 0.7 V VCC =.7V to.6v 0.8 TA Operating Free-Air Temperature C. All unused control inputs of the device must be held at VCC or to ensure proper device operation.

3 LOW-VOLTAGE 4-BIT BUS EXCHANGE ITCH DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 40 C to +85 C Symbol Parameter Test Conditions Min. Typ. () Max. Unit VIK Control Inputs, Data I/O VCC = V, II = 8mA. V II Control Inputs VCC =.6V, VI = VCC or ± μa IOZ Data I/O VCC =.6V, VO = or.6v switch disabled 5 μa IOFF VCC =, VI or VO = or.6v 0 μa ICC VCC =.6V, IO = 0, VI = VCC or 0 μa ΔICC () Control Inputs VCC =.6V, one input at V, other inputs at VCC or 00 μa CI Control Inputs VI = V or 0 5 pf CIO(OFF) VO = V or 0 (switch off).5 pf Max. at VCC =.V VI = 0 IO = 64mA 5 8 Typ. at VCC =.5V IO = 4mA 5 8 RON () VI =.7V IO = 5mA 7 40 Ω VI = 0 IO = 64mA 5 7 VCC = V IO = 4mA 5 7 VI =.4V IO = 5mA 0 5 NOTES:. Typical values are at.v, +5 C ambient.. The increase in supply current is attributable to each input that is at the specified voltage level rather than VCC or.. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. ITCHING CHARACTERISTICS VCC =.5V ± 0.V VCC =.V ± 0.V Symbol Parameter Min. Max. Min. Max. Unit tpd () Propagation Delay ns A to B or B to A tpd Propagation Delay. 8.8 ns ten Output Enable Time ns tdis Output DisableTime ns. The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance when driven by an ideal voltage source (zero output impededance).

4 LOW-VOLTAGE 4-BIT BUS EXCHANGE ITCH TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS Symbol VCC () =.V±0.V VCC () =.5V±0.V Unit VLOAD 6 x Vcc V Vcc V.5 Vcc / V VLZ mv VHZ mv CL 50 0 pf SAME PHASE INPUT TRANSITION OPPOSITE PHASE INPUT TRANSITION tplh tplh tphl tphl VOH VOL Propagation Delay (, ) Pulse Generator VIN RT VCC D.U.T. VOUT CL Test Circuits for All Outputs DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. VLOAD Open CONTROL INPUT ITCH NORMALLY CLOSED LOW tpzh NORMALLY HIGH ENABLE tpzl ITCH OPEN VLOAD/ DISABLE tphz Enable and Disable Times tplz VLOAD/ VOL + VLZ VOL VOH VOH -VHZ. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. NOTES:. Pulse Generator for All Pulses: Rate 0MHz; tf.5ns; tr.5ns.. Pulse Generator for All Pulses: Rate 0MHz; tf ns; tr ns. ITCH POSITION Test tplz/tpzl tphz/tpzh tpd Switch VLOAD Open 4

5 LOW-VOLTAGE 4-BIT BUS EXCHANGE ITCH ORDERING INFORMATION XX CBTLV XXX XX Temp. Range Device Type Package X Blank 8 Tube or Tray Tape and Reel PAG Thin Shrink Small Outline Package - Green 6 Low-Voltage 4-Bit Bus Exchange Switch C to +85 C Datasheet Document History /04/04 Pg. 5 Updated the ordering information by removing the "IDT" notation, non RoHS part and by adding Tape and Reel information. CORPORATE HEADQUARTERS for SALES: for Tech Support: 604 Silver Creek Valley Road or logichelp@idt.com San Jose, CA 958 fax: